Cancelled Phase 1.2 Set up PWA

[pamelagilmour]

Tasks:
[x] Install and configure next-pwa package
[x] Create web app manifest (name, icons, theme colors, display mode)
[ ] Configure service worker for offline support and caching strategy
[ ] Test PWA installation on mobile (add to home screen)
[ ] Test offline functionality (basic page load without internet)

Deliverable: [What you'll have when this is done]

Notes: [Optional - any helpful context]